Answer:
A warrior amongst the flowers, he bears a thrusting sword. He uses it whenever he must, to defend his golden hoard.
What's as small as a mouse but guards a house like a lion?
Many have heard it, but nobody has ever seen it. It will not speak until spoken to. What is it?
What relies on columns but isn't a house, and asks for help but can't speak itself?
I'm white, I'm round, but not always around. Sometimes you see me, sometimes you don't.
I am your mother's brother's only brother in law. Who am I?